Altitude deviation altitude excursion upon receipt of TCASII RA.

Attributes
ACN	228842
Time
Date	199212
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : aml airport : dca
State Reference	VA
Altitude	msl bound lower : 8000 msl bound upper : 8600
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : iad tower : msp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 15000 flight time type : 2000
ASRS Report	228842
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Level 8000 ft inbound to dca we received TCASII RA to climb we were IFR and never saw the traffic. Aircraft was climbing below us to maintain 7000 ft. The closure rate set off RA alert. We followed TCASII commands and climbed clear of conflict and then returned to 8000 ft.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION UPON RECEIPT OF TCASII RA.

Narrative: LEVEL 8000 FT INBOUND TO DCA WE RECEIVED TCASII RA TO CLB WE WERE IFR AND NEVER SAW THE TFC. ACFT WAS CLBING BELOW US TO MAINTAIN 7000 FT. THE CLOSURE RATE SET OFF RA ALERT. WE FOLLOWED TCASII COMMANDS AND CLBED CLR OF CONFLICT AND THEN RETURNED TO 8000 FT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.